Traditional Fenton reaction is limited by the problem of free radical scavenging and always requires pre-acidification, which seriously hinders its practical application. In this study, an oxygen vacancy (OVs) assisted Fenton-like catalyst (Mn-CuO) was designed to degrade ciprofloxacin (CIP). Results showed that Mn₁₀CuO exhibited 3 times decomposition rate of H₂O₂ than that of CuO, and can make decent performances under a wide pH ranges (pH = 3.01–10.00). This can be ascribed to the Cu-Mn binary synergism and formation of OVs after addition of Mn²⁺, which not only improved the adsorption capacity of catalyst, but also promoted H₂O₂ activation. Moreover, different radical scavenging experiments and characterization shows that Cu(III) rather than ·OH dominated the degradation process in Mn₁₀CuO/H₂O₂ system. The degradation intermediates were analyzed by LC-MS, and proposed the possible degradation pathways. Moreover, this system can work efficiently in tap water, river water as well as lake water without adjusting pH. This work indicates that it is an efficient strategy to constructing Fenton-like systems by using surface defect engineering to develop efficient catalyst.

传统的芬顿反应受自由基清除问题的限制，总是需要预酸化，严重阻碍了其实际应用。在这项研究中，设计了一种氧空位（OVs）辅助的类芬顿催化剂（Mn-CuO）来降解环丙沙星（CIP）。结果表明，Mn ₁₀ CuO对H ₂ O ₂的分解速率是CuO的3倍，并且在较宽的pH范围（pH = 3.01-10.00）下都具有良好的性能。这可以归因于添加Mn ²⁺后Cu-Mn二元协同作用和OVs的形成，不仅提高了催化剂的吸附能力，而且促进了H ₂ O ₂激活。此外，不同的自由基清除实验和表征表明，Cu(III)而不是·OH在Mn ₁₀ CuO/H ₂ O ₂体系中主导降解过程。通过LC-MS分析降解中间体，并提出可能的降解途径。此外，该系统无需调节pH即可在自来水、河水和湖水中高效工作。这项工作表明，利用表面缺陷工程开发高效催化剂是构建类芬顿体系的有效策略。